Sugar-cane mill.



A. G. HAWES.

SUGAR CANE MILL.

APPLICATION FILED JAN.29, 1915.

Patented Jan. 25, 1916.

2 SHEETS-SHEE'T 1.

THE COLUMBIA PLANOURAPH CO, WASHINGTON, D. C-

THE COLUMBIA PLANOOIAPH c0, WASHlNGToN. D. c.

Patented Jain. 25,1916.

2 SHEETS-SHEET 2.

I em.i si

new cr mina ALEXANDERGILCHRIST HAWES, DE LAS- DELICIASQGUBA I SUGAR-CANE MILL.

To all whom it may concern."

Be it known that I, ALEXANDER G. HAwns,

a citizen of the United States, residing at Las Delicias, Province or Oriente, Cuba,

have invented certain new and useful Improvementsin Sugar-Cane Mills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable'others skilled; in the art to which it appertains to make and use the same. j 1

The invention relates tosugar-cane'mills of the type employing tlii'ee, rolls'in tria'n gular arrangement, to wit, a lower feed roll, a lower discharge rolland an. upper pressure roll cooperating with "the two lower rolls to crushthe cane and extract the juice therefrom. In mills of this character, it has been customary to provide one or more of the rolls with adjustable pressure devices, to regulate the pressure imposed upon the cane passing through the mill, and also to permit one of the rolls, usual-1y theupper roll, to have a certain amount of movement relative to the other rolls inorder to accommodate the different charactersand conditions of,

the cane fed to the mill, Accordingto' the generally accepted sugar-mill practice, the adjustable pressure-applying devices take the form of hydraulic jacks associated with the journal bearings of one or more of'the rolls and mounted in the frame of the mill to permit the roll or rolls thus provided to move away from I the other rolls when a heavy feed of cane is "delivered. In order to secure the best results from a sugar-cane mill, it is desirable that the pressures imposed between the feed roll and the top roll on the one hand, and the discharge roll and the top roll on the other, be main tained constant and ina certain prcdeter mined relation. This has not been possible of realization, however, with any of the various types of mills heretofore in use for the,

reason that the movementof any one, or more of the rolls in a rectilinear direction against the imposed pressure produced by the cooperating hydraulic jacks inevitably resulted in a distinct change or variation in the relation of the pressures between the upper roll and the feed and discharge rolls respectively. p y

The object of the presentinvention isto provide a 1 in which a predetermined relation otpressuresbetween the top roll Specification of was Patent; Patented J an. 25,1916. 7 Application filed January 1915. Seri l 2 i l I l inaybe varied at thewill of the operator to suitany particular condition of feed. To this end, the invention contemplates theprovision in a three [roller mill of regulable means, such as hydraulic jacks, for imposing compound pressure on theupper roll, the

resultant of which pressure is constant as to direction and lntensity for varying conditions of feed, and to permit the proper application of such compound pressure and the necessary movement of the upper roll with respect to the feed roll and also the discharge roll, the upper roll is mounted in journal bearings, carried by links which are pivotally connected" to the shafts of the lower rolls, which links have mounted in their upper ends, thehydraulic jacks, adapted to impose. differential predetermined pressures on the upper roll, substantially normalvto the axes of the upperroll andthe feed roll and of the upper roll and the discharge roll respectively.

. Inthe accompanying drawings: Figure 1 is a side elevation of acane mill involving a the invention, the driving gears of the rolls being omitted; and, Fig. 2 is an elevation of the mill from the delivery side. I

Referring to the drawings, 1 indicates a bed-trame of suitable form and arrangement, upon which is journaledthe feed roll 2, the discharge roll 3 and the upper roll ,4: of a three-roll mill. each of said rolls being providedwith shafts 2, 3 and 4, respectively, by which the rolls are driven, and

which shafts are provided on each end with driving pinions, the gears 50, 50 on the lower rolls eachmeshing with gears 51, 51

kon'the upper roll, as illustrated in Fig. 2.

These gears may be operated in any suitable manner, preferably by a driving gear meshing with the ears of the lower rolls, at one side of the mill,in accordance with the usual practice.

The discharge roll 3 is mounted in rigid "bearingsconsisting of lower and upper bearing blocks 5 and 6, which are rigidly secured to thebed plate 1 by anchor bolts 7 and cross yoke 8, at each side of the mill.

Feed roll 2 is preferably mounted inrock- 'ing bearings 32 located on each side ofthe,

and resting span the upper face ofthe bed plate 1, more particularly shown in Fig. 1. r I s 1 The upper roll 1 is'supported by its end journals 4 in two sets of links or struts 10 and 30, the pair of links 10 .being'rpivotally connected to the shaft 3 of the discharge roller 3, and the pair of links 30 being con nected at their lower ends with the rocking bearings 32, in'whichthe shaft 2 of feed roller 2 is journaled, so that said links 30 a are, therefore, pivotally connected to the j shaft of the feed roll. Each link 10 comprises two longitudinal bolts 11 connected at their lower'ends by a yoke 12, upon which is supportedthe lower journal bearing 14: engaging. shaft 3. The intermediate portion of the link comprises an. upper journal bearing15, a filler piece 20, and a series ofremovable shims 21 interposed between the filler and the upper bearing 15,.to admit of the effectivev length of the link between the axes of the shafts 3 andl being adjusted, to. thereby regulate the opening of.

the discharge pass. of the mill between the upper roll 4 and the discharge roll 3. Above thefiller 20 are located the two bearing memhers 16 and 17, which engage the shaft 1 of i the upper roll, and interposed between the upperbearing 1,7,. and the yoke 12, connect ing the upper ends of the bolts 11, is a hydraulicjack 19 which, may be connected as usual with a suitable accumulator, not shown, The yoke 12 is adjustably secured tow the bolts 11 by means of nuts 13, so that said yoke 12 and the member of the hydraulic jack connected therewith may be adjusted 7 longitudinally of the. bOlts 11., r

Each of the, links 30 consists of two longivtudinal-bolts 31, which arejrigidly connected to thecorresponding rocking bearing 32, as indicated in Fig. 1,a-nd between saidrods are mounted an upper bearing Seengaging shaft 2 a. se i s o remorable shims." .1., a filler piece' Q, bearing b. QCkS; and 37 engaging. theshaft 4 or the upper roll, a yclraul e jack'39, connected w th ot r accumulator, a yoke 32:", and adjusting nuts 33.

-.planes ofthe longitudinal axes of the supporting links. 10 and 30, respectively, and,

therefore, normalto, the, axes of the feed roll and h upper roll on the ne hand, and f {the discharge r 1. the-upper roll on the the respective sets of jacks 19 and 39, the re-' sultant of the two pressures will be constant both in direction and intensity,'so'that any given feed of cane passing through the mill will be, subjected to uniform pressures on both the feed and delivery sides of the mill.

Each set of hydraulic jacks 19 and 39 is preferably connected with a separate accumulator, so that any desired difference of pressure may beimposed upon the respective jacks and transmitted to the upper roll. By changing the pressure on either set of hydraulic jacks, the. resultant pressure of the top roll may be changed to bear heavier on either of the bottom rolls, or if desired, to

be evenly distributed between. the two bottom rolls. This resultant pressure, when once determined, remains constant under all feeds of cane. If, forexample, a pressure of 200 pounds per square inch is imposed on the front jacks 39. and a pressureof 400 pounds per square inch on the back jacks 19, the re-.

sultant of these pressures will have a direction which will not change, but will remain constant whether the feed of the cane be heavier or li htandthe com onent res;

sures exerted between the upper roll and the feed roll on one hand, and the upper roll and-the delivery roll on the other hand will remain constant, so that the cane will be fed uniformly through the mill, without tendency to choke and a maximum and uniform extraction of the juice will result.

As is well known, different grades of cane require different settings or adjustments of 1 the feed -and discharge passage as well as the pressures imposed between. the vrolls forming thesev passes. By appropriately changing or varying the relative pressures produced by thetwo sets of jacks 19. and:39,

it may be readily, effected by the removing oradding-weights to the accumulators supplying the, respective jacks, the resultant pressure on thetop' you may bevaried in direction, and also in intensity, and these changes of adjustments may be "effected while the; mill is running, thereby allowing a change of setting of the mill to suit the variations in, the cane to be. ground. In order to adjust the setting of thetop roll with respect to'the feed and discharge rolls, to regulate the feed and discharge passes of the mill, the eii'ective lengths of the links between the axes of the topfroll and the feed roll and discharge roll, respectively,

be varied by adding or removing the shims -21 and41, respectively, and correspondingly adjustmg the set'nuts on the 7 upper portions of the links 10 and 30. In order to take up any-side thrust of the rollers and also to prevent any of the cane esgaping laterally of the rolls, the roll 4 is preferably provided with end flanges which .orer ieand engage, the and faces of the feed mile; a ;aesza e er:

turner bar 45,,of any suitable or desired type, may be applied between the feed and discharge rolls, as indicated in Fig. 1.

What I claim is s I 1. In a sugar-cane mill, the combination with the upper roll and two lower rolls, of regulable means for imposing compound pressure on the upper roll, the resultant of which pressure is constant as to direction and intensity for varying conditions of feed. 2. In a sugar-cane mill, the combination with the upper roll and two lower rolls, of regulable means for imposing two component pressures on the upper roll normal respectively to the axes of the upper and the two lower'rolls, whereby the resultant pressure on said upper roll is maintained constant for varying conditions of feed;

3. In a sugar-cane mill, the combination with the upper roll and thetwo lower rolls, oi links pivotally connected to the lower rolls and having journal bearings in which the upper roll is supported, and regulable means carried by each link for imposing pressure on the upper roll.

4. In a sugar-cane mill, the combination with the upperroll and the two lower rolls, of two pairs of links pivotally connected to the lower rolls and having journal bearings in which the upper'rollis supported, and

regulable means carried by each link for imposing pressure on the upper roll.

,5. In a sugar-cane mill, the combination with the upper roll and the two lower rolls, of two pairs of links pivotally connected to the lower rolls and having journal, hearings in which the upper roll is supported, and a regulable hydraulic jack carried by each link for imposing pressure on the upper upper roll is'supported, and a regulable hydraulic jack carried by each link for lmposing pressure on the upper roll.

7. In a sugar-cane mill, the combination of a lower feed roll having rocking journal bearings, alower discharge roll having fixed journal bearings, two sets of links pivoted.

to opposite sides of the lower rolls and having journal bearings in which the, upper roll is supported, and regulable hydraulic jacks carried by the upper end of each link for imposing pressure on the upper roll.

In testimony whereof I ailix my signature, in presence of two witnesses.

ALEXANDER GILCHRIST HAWES.

I Witnesses ANGEL PnRDoMo, T. B. YoUMANs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

7 Washington. D. 0. 

